Two that I haven’t seen mentioned are Boyt Harness Company’s heavy weight socks and some of the Browning line.
I passed through Morgan, Utah, in early fall, bought a pair at the factory store to try. Used them several times hunting elk and chukars. On trip back through, bought four more pairs. I’ve since used them a lot in cold conditions and haven’t tried any that were better. These are 81% Merino wool, 17% nylon, 2% Spandex.
